CSWIP NDT WELDING

Keywords for this article are RedSafe Nucleic Acid Question Answers CSWIP Course. Welding Course. TWI Course. CSWIP Course. Welding Inspection Course

RedSafe Nucleic Acid Question Answers CSWIP Course

Several isotopes of elements such as hydrogen and carbon exist in nature. The isotopes of any given element differ only in terms of:

• the number of protons in the nucleus
• the number of alpha particles in the nucleus
• the number of neutrons in the nucleus
• chemical properties

The difference between x-rays and gamma rays of equal photon energy is:

• the wavelength of the gamma rays is shorter
• x-rays originate from an x-ray tube whilst gamma rays originate from a radioactive material
• the gamma rays are more hazardous to health
• the gamma rays have a higher velocity than the x-rays

If an ytterbium 169 has a half life of 32 days and the original source activity is 5 Ci, what will the source activity be 96 days later?

• 5 Ci
• 25 Ci
• 625 Ci
• 3125 Ci

The type of radiation that has a quality factor of 20 is:

• gamma radiation
• beta particles
• alpha particles
• x-radiation

When a radiation incident occurs, such as a gamma ray source becoming jammed in the delivery tube the most sensible way to proceed is to:

• monitor the area until the HSE representative arrives
• after first of all securing the situation – if possible covering the source with bags of lead shot, adjusting safety barriers etc – make a plan of the actions that will be needed to make the source safe
• bury the equipment under several meters of earth
• call the fire brigade

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Main Keywords of this article : Magnetic Particle Inspection Question and Answers BS EN 9934-1. Welding Course. TWI Course. CSWIP Course. Welding Inspection Course.

Magnetic Particle Inspection Question and Answers BS EN 9934-1

1. The magnetic field remaining in a component after the magnetising force has been switched off is called:

1. coercive force
2. saturation
3. residual magnetism
4. hysteresis

2. Powdered iron oxide suspended in paraffin and applied after the current has been switched off is a description of which method of testing?

1. Wet continuous
2. Dry continuous
3. Wet residual
4. Dry residual

3. Which brings out surface indications most clearly?

1. AC
2. DC
3. HWRAC
4. Contact current flow

4. Leakage fields are caused by:

1. a local permeability change
2. a greasy surface
3. a dirty surface
4. all of the above

5. Magnetic particles must possess:

1. high electrical conductivity
2. low density
3. high permeability
4. none of the above

6. Which of the following is the best definition of flux density?

1. the number of lines of magnetic force passing through a unit area
2. the total number of lines of force in a magnetic circuit
3. the number of lines of magnetic force per kilogram
4. the number of lines of magnetic force per amp of magnetising current

7. Magnetic particles are most often made from:

1. powdered cobalt
2. granulated nickel alloy
3. powdered magnetic iron oxide
4. plastic

 

8. When MPI is performed with non-fluorescent ink, the minimum level of white light illumination that must be present at the area under inspection is:

1. 50 lux
2. 500 lux
3. 2000 microwatts per square millimetre
4. 10 lux

9. The SI units of magnetising force are:

1. coulombs
2. tesla
3. amperes / metre
4. photons

10. Demagnetisation will most likely be required when:

1. Retentivity is high
2. Retentivity is low
3. The component is to be heat treated at a temperature above the Curie point
4. None of the above

11. Fluorescent methods would most likely not be suitable for:

1. very rough surfaces
2. very smooth surfaces
3. detecting very fine cracks
4. use with an AC yoke

12. Burmah Castrol strips will give a reasonable indication of adequate flux density if used in conjunction with:

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